ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Jiejun Ren,Boheng Dong,Xiaopeng Zhou,Huiping Liu,Churen Zhang,Fan Liu,Liangjun Chen,Yuhua Wang
Halide perovskites have risen as promising circularly polarized luminescent (CPL) materials for applications in 3D displays, optical anti-counterfeiting, and information storage. And yet, achieving highly anisotropic CPL emission from achiral halide perovskites remains fraught with challenges. Herein, the helical channels of chiral MOFs (L/D-MOFs) are utilized as chiral templates for the in-situ growth of CsPbBr 3 perovskite nanocrystals (NCs), generating CPL-active CsPbBr 3 @L/D-MOFs materials with high luminescence dissymmetry factors (|g lum |, 8.39×10 −3 ) and high photoluminescence quantum yields (QY, 78%). Synchrotron-radiation-based X-ray absorption spectroscopy clearly verifies that the embedded CsPbBr 3 NCs inherit the helicity of L/D-MOFs through strong Cd─Br coordination bonds, thereby facilitating chirality transfer from L/D-MOFs to CsPbBr 3 NCs. Additionally, the efficient Förster resonance energy transfer (FRET) from chiral L/D-MOFs to CsPbBr 3 NCs further amplifies the CPL signal of CsPbBr 3 NCs. Benefiting from the excellent CPL properties and tunable emission, the CsPbX 3 @L/D-MOFs demonstrate great potential in CPL-LEDs. This work proposes a viable strategy for the rational design of high-performance CPL-active perovskite materials and offers profound insights into the chirality transfer mechanism.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
手性光子学
·
钙钛矿光电子
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Yixin Cao,Yuxiao Fang,Li Yin,Yang Fang,Ganggui Zhu,Linhui Li,Zhuo Chen,Jun Cao,Yina Liu,Chun Zhao,Guohua Lu
The physical scaling limitations of CMOS technology and the impending end of Moore’s Law have led to increasing interest in neuromorphic computing approaches to enhance computational performance. Inspired by the parallel computing capabilities of the human brain, neuromorphic devices that integrate memory, computation and perception have been developed to address these challenges. Among various perception simulations, vision is particularly important, as it accounts for over 70 % of sensory input in humans. Full-spectrum technology, as a method capable of capturing rich optical information, has effectively realized the process of simulating visual target detection. Meanwhile, the perovskite-structured material CsPbI 3 , with its wide-spectrum absorption, high photoelectric conversion efficiency, and excellent stability, which makes CsPbI 3 an ideal candidate for visual arrays that can span the full spectrum of light. In this study, we propose a full-spectrum perovskite-based visual array for use in unmanned object detection platforms, replacing the conventional perception, memory, and computation units. By extracting parameters from all 64 devices on a single visual array and inputting them into a neural network, we achieved a more realistic and comprehensive simulation of ground target detection and recognition compared to previous methods. The results demonstrate significant improvements in data processing efficiency and performance, suggesting broad potential for application in intelligent devices, industrial automation, and medical equipment .
研究领域:
神经形态工程
·
光电子学
·
人工智能
·
材料科学
·
计算机视觉
·
传感器与探测器
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yun-Fan Yan,Yu Shang,Ming-Yu Guo,Shao-Li Chen,Meng Cui,Zhi-Hong Yu,Wei-Xiong Zhang,Xiao-Ming Chen
Perovskite-type (ABX 3 ) oxidizer-fuel-integrated structures have been employed as a reliable platform for one-pot non-covalent assembly of emerging multi-ionic integrated explosives (MIXs) directly from non-energetic organics. Exploring non-perovskite structures to overcome the stoichiometric bottleneck is critical for unlocking design flexibility of these emerging materials, yet remains challenging without guiding principles. Herein, we propose a “interpenetrating dual networks” strategy to design a groundbreaking MIX, (H 2 eda) 2 (NH 4 )(ClO 4 ) 5 (EAP-4, H 2 eda 2+ = ethane-1,2-diaminium). In EAP-4, a scheelite-type network, where NH 4 + and ClO 4 − occupy special positions, interpenetrates with its fluorite-type counterpart (H 2 eda 2+ and the remaining ClO 4 − ions), forming a non-perovskite I 4 1 / a structure. This unique structural feature endows EAP-4 with exceptional positive oxygen balance based on CO 2 (+6.3 %, surpassing all known energetic perovskites), high synthesis efficiency (achieving over 70 % yield within 10 mins), and a high crystal density of 1.912 g·cm −3 . This innovative design establishes EAP-4 as a dual-function material: (1) an explosive with superior synthesis scalability and higher detonation capability than the widely used military explosive cyclotrimethylenetrinitramine (RDX); (2) a solid oxidizer with 24.5-fold higher thermal decomposition efficiency and significantly greater aluminum reactivity compared to the benchmark oxidizer ammonium perchlorate (AP). This work not only provides a non-perovskite paradigm for tuning energetic materials but also facilitates the systematic development of multi-ionic hybrid materials.
研究领域:
含能材料
·
材料化学
·
无机固态化学
·
炸药工程
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2017
·Vol. 8
·期 1
·2
·
IF 1.566
Mian Zhang,Hongbo Li,Qiang Jing,Zhenda Lu,Peng Wang
Recent microstructural studies on lead halide perovskite nanocrystals have consistently reported the coexistence of byproduct nanoparticles (NPs). However, the nature of these NPs and their formation mechanism are still a matter of debate. Herein, we have investigated the structure and compositions of the NPs located on colloidal cesium lead bromide nanocrystals (CsPbBr3NCs), mainly through aberration-corrected transmission electron microscopy and spectroscopy. Our results show that these NPs can be assigned to PbBr2and CsPb2Br5. The new CsPb2Br5species are formed by reacting CsPbBr3NCs with the remaining PbBr2during the drying process. In addition, observation of the metallic Pb NPs are ascribed to the electron damage effect on CsPbBr3NCs during transmission electron microscopy imaging.Keywords:lead halide perovskite materials;colloidal cesium lead halide nanocrystals;scanning transmission electron microscopy and spectroscopy
研究领域:
材料科学
·
纳米技术
·
电子显微镜
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Zhao Xueying,Tang Peng,Wu Guohua,Li Mang,Du Jiawei,Zhang Xuyang,Liu Nana,Wang Bo,Zhang Yaohong,Wang Xiangwei
Despite its high conductivity and lightweight properties, carbon black (CB) suffers from insufficient electromagnetic wave (EMW) dissipation and severe particle agglomeration, limiting its performance in advanced microwave absorption applications. To overcome these challenges, we developed a methylammonium lead iodide perovskite (MAPbI 3 )/CB composite system featuring micron-structured MAPbI 3 frameworks via a simple milling process. The micrometer-scale MAPbI 3 acts as a scaffold, effectively suppressing CB aggregation while simultaneously optimizing dielectric loss and impedance matching. This synergistic design enhances microwave absorption performance by improving EMW attenuation and broadening the effective absorption bandwidth (EAB). At a filling mass of 24 wt.%, the MCB-16/8 composite with CB fixed at 8 wt.% and MAPbI 3 share of 16 wt.% exhibits excellent EAB absorption properties, with an EAB reaching a wide absorption of 5.44 GHz at 2.05 mm and a minimum reflection loss as low as −64.22 dB at 2.3 mm. Also, the simulation results show the power loss density distribution within the MCB-16/8 and confirm a significant reduction of the radar cross-section (RCS), with excellent agreement between simulation and experimental data. This study presents a novel approach to address the agglomeration of carbon-based materials by constructing a micron-nanometer step heterostructure, offering an effective pathway for developing high-performance EMW absorption composites. Graphical
研究领域:
材料科学
·
电磁功能材料
·
微波吸收
·
纳米复合材料
·
钙钛矿材料
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Jianliang Li,Jing Li,Weili Liu,Conghui Tan,Meiqi An,Shuai Yang,Yanan Bao,Han Bao,Huayi Tang,Yingmin Luo,Yurui Fang,Jiao Xu,Yiming Yang
Thermal transport at the microscopic level is intuitively considered as a fast and random process. However, here the formation of significant microscale thermal inhomogeneity in single nanowires (NWs) of halide perovskites is reported, where the temperature gradient can be further converted to a compositional gradient via bandgap engineering. Upon employing a heat source or heat sink in the setup, arrays of composition-graded NWs are fabricated by anion-exchange with halogen-containing vapor. Quantitative analysis from multiple spatial-resolved scanning probe characterizations suggests that the exchange reaction occurs globally with a monotonically decreased rate along individual NWs, and the corresponding thermal simulation reveals a prominent temperature gradient up to 3.6 °C µm −1 in the axial direction. The large thermal inhomogeneity is attributed to the ultra-low thermal conductivity of perovskites combined with reduced nanowire (NW) diameter. In addition, the gradient NWs exhibit excellent optoelectronic features suitable for further integration into functional devices. This work provides guidelines for the composition manipulation of perovskites through phononic engineering, extending their applications in ultracompact microspectrometers, spectral imaging sensors, and other miniaturized optoelectronic devices.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
热输运
·
钙钛矿材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Hai Huang,Zijian Geng,Ankang Wan,Chunyan Cao,Daqin Chen,An Xie
Cesium lead halide (CsPbX3; X = I, Br, Cl) perovskite quantum dots (PQDs), owing to their outstanding optoelectronic properties, are regarded as highly promising color conversion layer materials for next-generation wide-color-gamut display technologies. Unfortunately, compared with the increasingly mature production process of green-emitting CsPbBr3 QDs, red-emitting CsPbI3 QDs suffer from irreversible phase transitions induced by environmental stresses, leading to performance degradation that limits their applications in LEDs. The preparation of CsPbI3 QDs with both high photoluminescence quantum yield (PLQY) and stability remains a significant challenge. In this study, based on a low-temperature in situ crystallization process, we propose a synergistic optimization strategy combining metal ion doping and ligand engineering. By introducing phenethylammonium iodide (PEAI) as a surface ligand, we effectively reduced the defect density on the QDs surfaces, thereby enhancing luminescence. Meanwhile, through systematic optimization of Zn2+ doping concentration, we successfully fabricated Zn2+-doped CsPbI3/PVDF composite films with excellent luminescent properties, achieving a PLQY of 86%. Furthermore, by integrating the Zn2+-doped CsPbI3/PVDF composite film with a green-emitting film, we constructed a dual-emissive-layer architecture and successfully fabricated a white-light-emitting device driven by a blue light-emitting diode (LED). The device exhibited an outstanding wide color gamut (121% of the National Television System Committee standard and 91% of Rec. 2020), along with excellent operational stability, highlighting the promising potential of CsPbI3 QDs for white-light LED applications.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
发光二极管（LED）
·
钙钛矿材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Chao Xu,Jinbiao Pan,Ting Zhang,Xinjiang Zhan,Shujuan Liu,Xiangmei Liu,Tianshe Yang
Rare-earth halide perovskites have demonstrated great potential for optoelectronic applications; however, the development of highly efficient narrow-band red-emitting materials remains insufficient, which severely limits their practical application. Herein, we successfully synthesized Cs2NaHoCl6 via partial substitution of Cs+ with Na+ in Cs3HoCl6 crystals. The incorporation of Na+ ions reduces the crystal symmetry, suppresses electron–phonon coupling, and inhibits nonradiative transitions. Without altering the Cl–Ho charge transfer process, this strategy indirectly enhances the probability of electronic transitions to the characteristic energy levels, resulting in an order-of-magnitude enhancement in the red emission of Ho3+ at 660 nm. The color purity is also significantly improved, with a full width at half maximum (fwhm) of 19.25 nm and CIE coordinates of (0.713, 0.283). When applied to X-ray detection and imaging, Cs2NaHoCl6 exhibits a relative light yield of 24,939 photons/MeV and a detection limit lower than that of the commercial scintillator CsI:Tl. Its performance remains stable under continuous X-ray irradiation for 30 min. Furthermore, the fabricated scintillator film outperformed a commercial GOS scintillating screen under the same testing conditions. This study not only provides fundamental insights into narrow-band deep-red-emitting rare-earth halide perovskites but also demonstrates their promising application in X-ray detection and imaging.
研究领域:
材料科学
·
光电子学
·
辐射探测
·
钙钛矿材料
·
稀土化合物
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2025
·
IF 16
Meiyu Yang,Xinyi Li,Rui Wang,Yang Zhao,Huan Wang
Charge-collection narrowing (CCN) enables filter-free narrowband photodetection in perovskite devices but requires thick active layers to suppress short-wavelength photons, limiting the photocurrent. Herein, through strategically designing the composition, size, and shape of metallic nanoparticles (MNPs) to enable precise regulation of their localized surface plasmon resonance (LSPR) bands, which coincide exactly with the targeted narrowband response ranges, the penetrated long-wavelength incident photons have strongly coupling interaction with the electromagnetic field around MNPs to effectively improve the light absorption by near-field enhancement-induced excitation (NFEE) effect, resulting in the significant photocurrent enhancement. Based on the patterned-ITO glass substrates decorated with silver nanoparticles (AgNPs), gold nanoparticles (AuNPs), and gold nanorods (AuNRs), respectively, the lateral-type photoconductive CCN photodetectors (PDs) with MAPbX3 (X = Cl, Br, and I) microcrystalline films were successfully constructed. The MAPbCl3–AgNPs, MAPbBr3–AuNPs, and MAPbI3–AuNRs CCN PDs showed the peak responsivity as high as 171.1 A W–1@410 nm, 269.1 A W–1@550 nm, and 452.7 A W–1@830 nm under the bias voltage of 5 V, respectively, along with full-width at half-maximums (FWHMs) in wavelength ranges limited to only 20–30 nm. Meanwhile, MNPs in the dark state can reduce the dark current as the electron trapping medium to facilitate the specific detectivity (D*) of PDs. Consequently, MAPbCl3–AgNPs, MAPbBr3–AuNPs, and MAPbI3–AuNRs CCN PDs achieved an ultrahigh D* of 1.26 × 1014 Jones, 1.84 × 1014 Jones, and 3.13 × 1014 Jones, respectively, which had 2.36-times, 2.10-times, and 2.52-times enhancement compared to pristine devices without MNPs decoration. The primary results provide insights into the development of high-performance and wavelength-selective narrowband perovskite photodetectors.
研究领域:
光电子学
·
纳米光子学
·
钙钛矿材料
·
等离子体光子学
·
光电探测器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Xiangyan Li,Quanling Jiao,Liangyu Zhai,Abulikemu Abulizi,Anwar Mamat
Due to their unique photoelectric properties, perovskite quantum dots (PQDs) are of growing interest. The preparation of pure red-emitting perovskite materials is a key step to achieve a full-color display. To date, the precise growth mechanism of CsPbI3 QDs under thermodynamic equilibrium control remains unexplored. We reveal the regulation of reaction parameters on the nucleation and confined growth of pure-red CsPbI3 strongly confined quantum dots (SQDs). Key intermediate perovskite nanoclusters in the formation of SQDs were revealed, and the effects of the ligands and temperature on their growth pathway were systematically investigated. By adjusting the reaction parameters, such as the ligand concentration, ratio, and temperature, control over size, size distribution, and phase (CsPbI3 or Cs4PbI6) can be achieved. Furthermore, our findings shed light on the solubility of PbI2 in this iodine-rich synthesis system and are suggested to aid the understanding of ligand-mediated size and phase control of CsPbI3 QDs.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
量子点
·
钙钛矿材料
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·10078
·
IF 15.7
Zheng Weilin,Chen Jiangkun,Guo Yang,Zhang Xin,Chun Fengjun,Cao Yaxin,Gao Xiaoping,Suo Hao,Wei Xiaohe,Xing Zhifeng,Wang Yanze,Wang Feng
CsPbX 3 (X = Cl, Br, I) nanosheets have emerged as a promising platform for tuning quantum confinement effects and achieving efficient optoelectronic devices. However, synthesizing uniform CsPbX 3 nanosheets with monolayer-level thicknesses remains a challenge due to the fast reaction kinetics. Herein, we develop a synthetic strategy that leverages Pb-deficient precursors to control reaction kinetics. Our experimental investigations indicate that Pb deficiency in the precursors decelerates the crystal growth, offering enhanced dimensional control in CsPbX 3 systems. This approach enables the synthesis of uniform CsPbI 3 nanosheets with tunable thickness down to two octahedral layers, which exhibit a narrowband emission at 563 nm and high stability against spectral drift. This method is readily extended to CsPbBr 3 and CsPbCl 3 systems for precise size and shape modulation, thus affording full-color emission tuning within mono-halide perovskites. These findings establish a versatile synthetic strategy poised to advance the design and application of CsPbX 3 nanomaterials and other colloidal nanocrystals.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
钙钛矿材料
·
胶体纳米晶体
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2025
·
IF 15.7
Liu Jiaqi,Liao Mingquan,Latella Riccardo,Yuan Junhui,Liu Zheng,Wen Jiaxin,Ling Qinghao,Xu Yinsheng,Konstantinou Georgios,Lecoq Paul,Xia Mengling,Niu Guangda
Ultrafast radiation detection is crucial for advancing medical imaging, high-energy physics, astronomy, and industrial applications, offering high spatiotemporal resolution and reduced radiation exposure. However, the bottleneck lies in the formidable challenge of achieving scintillators with both ultrafast response and high efficiency. Contrasting with previous approaches that focused on molecular-level confinement, here we propose the strategy of pushing exciton confinement to the limit of atomic scale. Using 2D perovskites as a model, we design organic A-site cations to selectively enhance in-plane distortion to localize excitons, while suppressing out-of-plane and intra-octahedral distortions to minimize the formation of inefficient, long-lived self-trapped excitons. Specifically, (1,4-CMA)PbBr 4 exhibits a rare combination of fast response (0.62 ns) and high light yield (19,700 photons MeV −1 ), surpassing leading commercial and research scintillators. These properties enable breakthroughs in advanced imaging, including fast positron emission tomography with timing precision of 43.3 ps and high-resolution X-ray imaging (32 lp mm −1 ).
研究领域:
材料科学
·
光电子学
·
辐射探测
·
纳米技术
·
钙钛矿材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）